ChatGPT Is Now a 'Very Large' Platform Under EU Law

OpenAI is about to face a significantly higher bar in Europe. According to ChatGPT to face tougher regulation in the EU, the European Commission officially designated ChatGPT a Very Large Online Search Engine under the EU's Digital Services Act on August 31, 2026. The move subjects OpenAI to a stricter set of rules around child safety, user mental health, illegal content, and algorithmic transparency. Reddit and Roblox were designated Very Large Online Platforms under the same announcement.

All three platforms have until the end of December 2026 to comply. This isn't a proposal or a consultation period. The clock is already running.

The Details: What the DSA Actually Requires

The Digital Services Act is the EU's framework for regulating major online services and platforms. Under the DSA, a platform earns the 'Very Large' designation once it hits at least 45 million average monthly users in the EU. ChatGPT, Reddit, and Roblox all cleared that threshold.

That designation carries real teeth. According to the announcement cited by The Verge, the DSA restricts platforms from targeting ads to minors or using sensitive personal attributes — including sexual orientation, religion, ethnicity, or political beliefs — for ad targeting. Platforms are also required to be more transparent about how their recommendation algorithms work.

The accountability focus goes beyond ads. OpenAI is now on the hook for actively mitigating risks tied to ChatGPT's impact on minors and user mental health, and for limiting the spread of illegal content. Henna Virkkunen, EU executive vice-president for tech sovereignty, security and democracy, said in the announcement: "These new designations mean that ChatGPT, Reddit and Roblox will now be held to a higher standard of scrutiny and accountability in the European Union, in line with their large impact on our citizens and society."

That's a direct quote from the Commission. Not spin. Not interpretation. They're explicitly tying platform size to platform responsibility.

What This Means for You

If you're running SEO or content strategy for brands with EU audiences, this is worth paying close attention to. Here's why.

ChatGPT is no longer just an AI chatbot in the eyes of European regulators. It's a search engine — legally. That framing matters. It puts ChatGPT in the same regulatory conversation as Google, Bing, and every other major discovery surface. If you're already thinking about AI search visibility, this designation signals that AI search tools are being taken seriously as gatekeepers of information. Regulation follows relevance.

For marketers running campaigns in the EU, the ad-targeting restrictions are the most immediate operational concern. You already can't use sensitive personal data categories for targeting on platforms like Meta under GDPR. The DSA extends that logic to AI-powered platforms. If ChatGPT eventually introduces ad products in the EU — or expands sponsored placements — those will face constraints from day one.

The algorithmic transparency requirement is the piece I find most interesting from a search strategy angle. When platforms are forced to explain how their recommendation and ranking systems work, that typically creates clearer signals for content creators and SEOs. It doesn't always happen immediately, but pressure for transparency tends to produce disclosures over time. Watch for that.

And yes — content moderation obligations will likely influence what ChatGPT surfaces and how it responds to certain queries in the EU. If your content strategy depends on being cited in AI answers for audiences in Europe, those citation patterns may shift as OpenAI adjusts its systems to meet compliance requirements.

What to Do Now

You don't need to panic. But you do need to pay attention. Here's where I'd focus energy right now:

1. Audit your AI search visibility for EU-relevant queries. If you have meaningful traffic or customers in Europe, understand where your brand is showing up — or not showing up — in ChatGPT, Perplexity, and Google's AI Overviews right now, before any compliance-driven changes hit.
2. Check your ad-targeting practices. If you or your clients are using sensitive data categories for personalization on any major platform, the DSA is another forcing function to clean that up. Better to get ahead of it than react to enforcement.
3. Watch OpenAI's DSA compliance disclosures. Platforms designated under the DSA are required to publish transparency reports and risk assessments. When OpenAI publishes those for the EU, they'll be a goldmine of signal about how ChatGPT ranks, filters, and surfaces content.
4. Document your E-E-A-T signals now. Regulations focused on user safety, misinformation, and harm reduction tend to make AI systems more conservative about what they cite. Brands with clear authorship, expertise signals, and clean content practices are better positioned when that happens.
5. Don't assume your global strategy covers EU nuance. The DSA compliance deadline is December 2026. That's not far away. If you have EU-specific content or campaigns, it's worth a dedicated review.

Background and Context

This designation didn't come out of nowhere. The EU has been building its regulatory framework for major digital platforms for years. The DSA itself came into force for Very Large platforms back in 2023, and the EU has already pursued enforcement actions against platforms like Meta under related legislation. The extension of these rules to AI-native tools like ChatGPT was, frankly, inevitable once usage crossed the 45 million user threshold.

What's new here is the framing. Calling ChatGPT a search engine — not a chatbot, not a generative AI tool — is a deliberate regulatory choice. It places it alongside Google and Bing in terms of how European law thinks about the power these systems have over information access. That framing will likely influence how other jurisdictions approach AI regulation going forward.

I've watched algorithm updates and platform policy changes reshape SEO strategies more times than I can count. What tends to happen is this: regulation forces transparency, transparency creates clearer signals, and clearer signals reward brands that were already doing the right things. This should be no different. The brands that will feel pain from DSA compliance are the ones cutting corners on content quality or targeting practices. If that's not you, this news is mostly about staying informed.

If you want to keep a close eye on how your brand is showing up in AI-generated answers as these compliance changes roll out, AI visibility tracking is exactly the kind of thing worth building into your regular reporting now — not after the December deadline passes.